Key.



J. S. ISIDOR.

KEY.

APPLICATION FILED JUNE 30, 1913.

Patented Feb. 9,1915.

INVENTOR? fluse l law, M 1

fwlTNEssEs r T MW Cr ni m/9 C da 1 ATTORNEYS V JOSEPH s. IISIDOR,;OF NEWARK, NEW JERSEY.

EPIC. 1"

' KEY.

To allwhom it may concern:

Be it known that I, JosErH S. Isrooma citizen of the United States, residing at Newark, in the county of Essex and State of; New Jersey, have invented certain new and useful Improvements in Keys; and-I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference. being bad to the accompanying drawings, and to characters of reference marked thereon, which form a part of this specification.

The present invention relates, generally, to improvements in keys. I

The invention has for its principal objects to simplify the general construction of keys, with a view of reducing" the cost of themanufacture of the same and providing a more accurate construction ofkey, as well as avoiding the loss of time'and obviating the increased expense in the boring-out operation of that class of keys which are pro vided with tubular or hollow shanks. The present invention has for its further object to secure other advantages and results not at this time more particularly enumerated and which will more fully appear from the following detailed description of the invention.

With the various objects of the present invention in view, the invention consists, primarily, in the improved key hereinafter set forth; and, the invention consists, furthermore, in the novel arrangements and com binations of the parts of the key, all of which will be'm'ore'fully described'in the following specification, and then finally em' bodied in the clauses of the claim which are appended to and which form an essential part of this specification. i

The invention is illustrated in the accompanying drawings, in which Figure 1 is a front elevation of a key made according to and embodying the princi'ples ofthe present invention; and Fig. 2 is a side elevation of the same. i Fig. 3 is a longitudinal vertical section of the key, said section being taken on line 3-3 in said Fig. 2; Fig. 4 is a transverse vertical section of the key, said section being taken .on line 4-4 in Fig. 1, looking in the direction 0f.

the arrow w; and Fig. 5 is a horizontal section of the key, said section being taken on line 5-5 in Fig. 3. Fig. 6 is a face view 3 Specification of Letters Patent.

of thebow of, the key, before being secured v -PIatenteaneb.9,1s15.

ApplicationfiledJ'uneiio, 191s. Seria1No.776,470. Y

to and connected with the tubular shank ofthe key; and Fig. 7 is a plan of a blank from which the tubular shank of the key andthe bit thereof are constructed,

Similar characters of reference are employed in all of the above describedviews, to indicate corresponding parts. I y Referringnow to the accompanying draw ings, the reference-character 1 indicates. a

complete key, showing one embodiment of.

the principles of the present invention, the

key comprising two separately made, but rlgidly'connected elements, namely the bow and the main tubular body or hollow shank.

The, bow is indicated by the reference-Z character 2 and connected with said bow, and forming an. integral partthereof, is a shank-extension, age. The said bow and itsextension may be in the form of 'acasting, or may be struck up out of fiat stock ofthe proper thickness-by means of a suitvable die, or other meanssuitable for the purpose. y

The main tubular body or hollow shank of the key is made from suitable flat sheet 7 steel, or other suitable metal, by means of a suitablediein the form of a blank, illusv o trated in Fig. 7- of the drawings, the blank comprising a flat and substantially rec tangular main body 5, formed at its lower edge-portion, and extending at right angles from the respective marginal edges 6 and 7 with suitablyformed' bit-extensions s and 9. Connectedwiththe upper marginal edge 10 of the main body 5 of the blank, and at suitable intervals, are a pair of bow-shank engagingextensions or pro ectiOns, as 11 and 12, preferably of the marginal configuration shown in said Fig. 7, and arranged substantially in the manner shown.

In producing the tubular body or hollow shankof the key, shown in Figs. 1 to 5 in-f elusive, by means of the proper tool or tools, the main body 5 of the sheet-metal blank is forced into a hollow or tubular cylinder, as 13, with the two bit-extensions, which are of the-same size, in registration with the other and resting one directly upon the other, so

that the tubular cylindrical shank is formed with a single key-bit, as 15, as will be 'evident from an inspection of the several figures of the drawings. The upper portions of the cylindrical shank thus produced, and upon opposite sides, are bent orturned inwardly, as at 16 and 17, see Figs. 2 and 4, so i ,ofthe hollow shank, until the edge-portions 19 and 20 of the bow suitably rest upon the opposite seat-portions formed between the projections 11 and 12 by the parts 21 and 22 of the upper marginal edge of the blankbody 5. The elements, thus assembled, are rigidly connected by brazing or otherwise securing the bow-shank engaging projections 11 and 12, to the opposite faces of the shank-extension 3, and by brazing or otherwise securing the joint formed by the registering longitudinal marginal edge-portions of the tubular cylindrical shank, and also by brazing or otherwise securing together the two registering bit-extensions 8 and 9, so as to produce a complete key of the general appearance indicated in Figs. 1 and 2 of the drawings.

From the foregoing description of the present invention it will be clearly evident, that I have produced, in a simple manner, a strong key, in which the tedious and more or less difficult operation of boring the shank of the key is entirely overcome, whereby a great saving in time and labor, and hence in the cost of construction is the result.

I claim 1. The improved key having a tubular shank and a bit formed of a single piece of sheet-metal, said bit comprising two bit-extensions of the same size and arranged face to face in registration with each other, and said tubular shank being formed upon its upper marginal edge with upwardly extending flat bow-shank engaging projections and seat portions located between said projections, combined with a bow having a flat shank-extension, said shank-extension being arranged between and secured to the fiat faces of said bow-shank engaging projections, substantially as and for the purpose set forth.

2'. The improved key having a tubular shank and a bit formed of a single piece of sheet-metal, said tubular shank being formed upon its upper marginal edge with upwardly extending fiat bow-shank engaging projections andseat portions located betweensaid projections, combined with a bow having a flat shank-extension, said shank-extension being arranged between and secured to the flat faces of said bow-shank engaging projections, substantially as and for the purpose set forth.

3. The improved key having a tubular shank and a bit formed of a single piece of sheet-metal, said tubular shank being formed upon its upper marginal edge with upwardly extending fiat bow-shank engaging projections and seat portions located between said projections, combined with a bow having a flat shank-extension, said shank-extension being arranged between and secured to the flat faces of said bow-shank engaging pro jections, and the upper marginal edge-portion of said tubular shank being formed with seat-portions upon which the marginal edge-portions of the bow contiguous to the shank-extension rest, substantially as and for the purpose set forth.

In testimony, that I claim the invention set forth above I have hereunto set my hand this 27th day of June, 1913.

JOSEPH s. ISIDOR.

Witnesses:

FREDK. C. FRAENTZEL, FREDK, M. W. FRAENTZEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of .Patents,

Washington, D. C. 

